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  • 1
    Electronic Resource
    Electronic Resource
    Die Dünnschichtchromatographie der Aminosäuren im Urin (1970)
    Springer
    Journal of molecular medicine 48 (1970), S. 682-688 
    Details
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Methods for thin-layer chromatography of urinary amino acids on commercially available procoated plates of micro-crystalline cellulose are presented. The urine is desalted by passing it through columns containing Amberlite CG 120 I. The amino acids are eluted by a solution of 5 per cent ammonia. The eluate is taken to dryness and dissolved in such an amount of water that 1 µl corresponds to 1 µg of creatinine. 1 µl is spotted to plates (10×10 cm) by micro pipets. Every urine is developed two-dimensionally by two solvent pairs. First pair: Ethanol-H2O (83:17), first direction, three times developed up to 8 cm, tert-Butanolmethylethylketone-NH3-diethylamine-H2O (35:35:10:0,4:20), second direction, once developed up to 8 cm. Second pair: n-Butanol-acetone-glacial acetic acid-H2O (35:35:10:20), first direction, phenol-formic acid (15 per cent) (250 g+83 ml), second direction, once developed up to 8 cm. Using these solvent pairs it is possible to separate most of the important urinary amino acids and diagnose or suspect most of the known metabolic disorders with a disturbed urinary excretion of amino acids. Phosphoethanolamine, S-sulphocysteine and taurine are lost by desalting the urine. Special problems of detecting and locating some amino acids are discussed.
    Notes: Zusammenfassung Es werden Methoden zur Dünnschichtchromatographie der Harnaminosäuren auf mikrokristalliner Cellulose angegeben. Vor der dünnschichtchromatographischen Trennung wird der Urin (Amberlite CG 120 I, H+-Form; Elution mit 5% igem NH3) entsalzt. Nach Einengen des Eluats zur Trockne und Lösung des Rückstandes in einer auf den Kreatiningehalt des Urins bezogenen Menge Wasser wird der Urin auf Cellulose-Fertigplatten der Fa. Merck AG. aufgetragen. Die Plattengröße beträgt 10×10 cm. Durch Verwendung von zwei Fließmittelpaaren ist es möglich, bei den meisten der bekannten Stoffwechselkrankheiten mit vermehrter Aminosäure-Ausscheidung eine Diagnose oder eine Verdachtsdiagnose zu stellen. Ausnahmen sind lediglich die Hypophosphatasie, der Sulfitoxydase-Mangel und die Taurinurie, da die bei diesen Störungen vermehrt ausgeschiedenen Aminosäuren Phosphoäthanolamin, S-Sulfo-l-cystein und Taurin bei der Entsalzung verloren gehen. Auf spezielle Probleme des Nachweises einzelner Aminosäuren wird eingegangen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01493814
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  • 2
    Electronic Resource
    Electronic Resource
    STREAMFLOW CHARACTERISTICS OF SMALL WATERSHEDS IN THE BLUE MOUNTAINS OF OREGON (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 25 (1989), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : Streamflow data for water years 1978–84 were evaluated to identify streamflow characteristics for 13 small watersheds (0.46–7.00 mi2) in the Blue Mountains of eastern Oregon and to determine differences among grazing intensities and vegetation types. The ranges for mean annual water yields, peak flows, and 7-day low flows for the 13 watersheds were 5.5–28.1 inches, 2.0–34.7 cfsm, and 0.006–0.165 cfsm, respectively. Two classes of vegetation were evaluated: (1) western larch-Douglas-fir (nine watersheds) and (2) other (four watersheds representing fir-spruce, lodgepole pine, ponderosa pine, and mountain meadow). The means for annual peak flows and the slopes of the flow.duration curve were significantly different (p=0.05) for the two vegetation classes; differences in mean annual water yield were marginallysignificant(0.05〈 p 〈0.10). After they were adjusted for precipitation, the means for annual water yield, peak flows, and slopes of the flow-duration curve were significantly different for the two vegetation classes; differences in the means for annual 7-day low flows were marginally significant. The western larch-Douglas-fir group had somewhat lower water yields but, overall, tended to have more favorable streamfiow characteristics including lower peak flows, higher low flows, and more evenly distributed flow regimes (flatter flow-duration curves) than the “other” class. Four levels of grazing intensity had no effect on streamilow characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1989.tb01326.x
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  • 3
    Electronic Resource
    Electronic Resource
    Reflection of high-frequency phonons at silicon-solid interfaces
    Amsterdam : Elsevier
    Physics Letters A 82 (1981), S. 291-294 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(81)90648-4
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  • 4
    Electronic Resource
    Electronic Resource
    Spins, moments and mean square charge radii of ^1^0^4^-^1^2^7In determined by laser spectroscopy
    Amsterdam : Elsevier
    Nuclear Physics, Section A 464 (1987), S. 9-28 
    Details
    ISSN: 0375-9474
    Keywords: Nuclear Structure ; Radioactivity
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(87)90419-2
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  • 5
    Electronic Resource
    Electronic Resource
    Diffusive scattering of high-frequency phonons at free silicon surfaces
    Amsterdam : Elsevier
    Physics Letters A 93 (1983), S. 152-154 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(83)90080-4
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  • 6
    Electronic Resource
    Electronic Resource
    Quantum "melting'' of orientationally ordered physisorbates (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 4538-4547 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Based on path-integral Monte Carlo simulations we investigate systematically the influence of quantum fluctuations on a model for orientational ordering. The quantum anisotropic-planar-rotor Hamiltonian with its herringbone ground state serves as our model for strictly two-dimensional, orientationally ordered linear molecules. We find several distinct regimes as the strength of the quantum fluctuations is increased: (i) a regime with renormalized transition temperature and ground state order parameter which describes systems like N2 physisorbed on graphite; (ii) crossover behavior with residual ground state order but an increased order parameter at higher temperatures; (iii) a regime characterized by vanishing ground state order but significant order in some range of higher temperatures; and (iv) a regime with orientational disorder at all temperatures. This sequence is interpreted in terms of reentrant rotational quantum melting. In addition we probe the range of validity of simple approximation schemes such as the quasiharmonic and the quadratic Feynman–Hibbs effective potential approximations. Both methods fail to describe the full scenario for large quantum fluctuations even on a qualitative level. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.469502
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  • 7
    Electronic Resource
    Electronic Resource
    Ectomycorrhizae as Biological Deterrents to Pathogenic Root Infections (1972)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Phytopathology 10 (1972), S. 429-454 
    Details
    ISSN: 0066-4286
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.py.10.090172.002241
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  • 8
    Electronic Resource
    Electronic Resource
    Cr(CoPtCr,CoPtx) layered film studies for hard bias applications : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5018-5020 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cr(backward-slash)(CoPtCr,CoPt) films were deposited on oxidized Si 〈100〉 substrates via dc magnetron sputtering. Process parameters, such as deposition rates, number of bilayers, and bias voltage, were varied to achieve the hard magnetic properties without thermal processing of the films. Coercivities in the range of 2000 Oe, with corresponding squareness of about 0.8–0.9, and remanent magnetization in the range (3–3.6) memu/cm3, were achieved by identification of the optimum conditions. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362438
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  • 9
    Electronic Resource
    Electronic Resource
    Ectotrophic Mycorrhizae as Deterrents to Pathogenic Root Infections (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 1139-1139 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have found evidence to support this hypothesis. Mycorrhizal and non-mycorrhizal roots attached to potted shortleaf pine (Pinus echinata Mill.) seedlings grown in finely divided shortleaf pine humus were enclosed in small glass cells and inoculated with zoospores (20,000/ml.) of Phytophthora ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2131139a0
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  • 10
    Electronic Resource
    Electronic Resource
    Metalorganic molecular beam epitaxy growth characteristics of GaAs using triethylgallium and trisdimethylaminoarsenic (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 1952-1958 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Metalorganic molecular beam epitaxy (MOMBE) growth characteristics of GaAs using triethylgallium (TEGa) and trisdimethylaminoarsenic (TDMAAs) are studied in detail by using reflection high energy electron diffraction intensity oscillations. It is found that the GaAs growth rate variation with substrate temperature (Tsub) is similar to that in the MOMBE growth of GaAs with TEGa and elemental As (As4) except in the high Tsub region, despite the use of uncracked TDMAAs instead of As4. GaAs growth starts at about 350 °C and shows a maximum growth rate at about 500 °C. However, the absolute growth rate is about 15% lower than that using As4 with the same TEGa flow rate in the mass-transport limited growth region. Above 600 °C the growth rate shows a rapid decrease with increasing Tsub. Further, it is found that etching of GaAs occurs when only TDMAAs is supplied to the GaAs surface at Tsub above 500 °C. Unintentionally doped GaAs films show n-type conduction in the whole Tsub range investigated with the highest 77 K electron mobility of 22 000 cm2/V s and a low carrier concentration of 2×1015 cm−3 for the 650 °C grown samples. 4.2 K photoluminescence spectra show an exciton-bound-to-impurity emission peak at the wavelength of 819.3 nm with a full width at half-maximum of less than 3.5 meV indicating good optical qualities. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358829
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